Extraire le code régional du numéro de téléphone Python

#this only works for numbers in Toronto or the greater toronto area, but its simple to expand it for more areas.
phone = input("Enter a 10 digit phone number: ")
phone = str.replace(phone, "(", "") #removes brackets
phone = str.replace(phone, ")", "") #removes brackets
phone = str.replace(phone, "-", "") #removes dashes
phone = str.replace(phone, " ", "") #removes spaces
areacode = phone[0:3]
if areacode == "416" or areacode == "647":
    print("This is a Toronto number")
elif areacode == "905" or areacode == "289":
    print("This is a GTA number")
i dont know what to put here